Decision Tools

Press Brake Tonnage Calculator

Free engineering calculator - no signup, runs in your browser.

DEW Machine Shop Tools

Inputs (air bending)

Material (tensile strength) Material Thickness S (mm) Bend Length L (mm) Die Opening V (mm)

Rule of thumb: V ≈ 8× thickness for thin material

Readout

BENDING FORCE

—kN

TONNAGE

—metric t

RECOMMENDED DIE & RADIUS

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Air-bend estimate; coining runs 3–5× this force. Verify against your machine and tooling ratings.